Social bookmarking is a way for internet users to store, classify, share, and search Internet bookmarks. In 2005 and 2006, social bookmarking sites, such as del.icio.us, Diigo, Furl, Ma.gnolia, Netvouz, and StumbleUpon became popular. Sites like reddit, Digg, Newsvine, and the new Netscape portal apply social bookmarking to news items. IBM even announced plans to enter the social software market this year.